Static contact structure suitable for C-GS direct-acting three-position switch

Abstract

The utility model provides a static contact structure suitable for a C-GS direct-acting three-position switch, and the structure comprises a hollow insulator which is used for supporting a live conductor. The umbrella skirt coats the outer side of the hollow insulator and is used for improving the insulating property and the protection effect; the hollow insulator is arranged at the end part far away from the mounting seat, a limiting device is arranged in the insulator thread bushing, and the limiting device is used for limiting and fixing between the insulator thread bushing and the static contact; the static contact comprises a contact and a contact sleeve, the contact is fixed on the outer circumferential wall of the contact sleeve, the contact is fixedly connected with the hollow insulator through the contact sleeve, a limiting groove is formed in the inner wall of the static contact, a limiting device is arranged in a threaded sleeve of the insulator, and the stability and the reliability of electrical connection are ensured through the limiting device; even under the action of external force, the static contact can be kept at a preset position and does not fall off or shift.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a static contact structure of a C-GS direct-acting three-position switch Background Technique

[0002] Medium-voltage gas-insulated switchgear has great advantages in volume compared with air-insulated switchgear. When miniaturized, due to the limited space inside the cabinet, the requirements for insulation design inside the cabinet are getting higher and higher. Since the linear moving three-position structure is simple, it is often used in compact medium- and high-voltage switchgear. Especially in medium-voltage gas-insulated switchgear, the linear moving three-position is one of the most commonly used three-position switches;

[0003] The existing Chinese patent document CN201520325563.8 discloses a static contact of a circuit breaker, including a static conductive sheet. One end of the static conductive sheet is a power input end, and the other end is a power output end. A silver contact and an arc guiding sheet are arranged on the power output end, and the silver contact and the arc guiding sheet are arranged on the same side of the power output end. One end of the arc guiding sheet is inserted into the static conductive sheet.

[0004] However, the above patent has certain defects in use. The static contact directly bears the impact of the moving contact during the contact breaking process, which is extremely easy to swing, resulting in unstable contact between the static contact piece and the moving contact piece;

[0005] Therefore, a static contact structure of a C-GS direct-acting three-position switch is proposed here to solve the above problems. Content of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a static contact structure of a C-GS direct-acting three-position switch.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] A static contact structure of a C-GS direct-acting three-position switch includes a hollow insulator, and the hollow insulator is used to support and insulate the live conductor;

[0009] An umbrella skirt, which is coated on the outside of the hollow insulator, is used to improve the insulation performance and protection effect;

[0010] A mounting seat, which is arranged at the bottom of the hollow insulator, is used to fix and support the entire insulator assembly, and the mounting seat and the hollow insulator are integrated;

[0011] An insulator threaded sleeve, the hollow insulator is arranged at the end far from the mounting seat, and a limiting device is arranged inside the insulator threaded sleeve. The limiting device is used for the limiting and fixing function between the insulator threaded sleeve and the static contact;

[0012] Stationary contact, the stationary contact includes a contact and a contact sleeve, the contact is fixed on the outer peripheral wall of the contact sleeve, and the contact is fixedly connected to the hollow insulator through the contact sleeve.

[0013] The limiting device includes a cavity, the cavity is arranged inside the insulator thread sleeve, a ball and a spring are arranged inside the cavity, one end of the spring is fixed inside the cavity, and the other end abuts against the ball, the front end of the ball extends out of the cavity, and a limiting groove is arranged on the inner wall of the contact sleeve.

[0014] The insulator thread sleeve includes a threaded part and a smooth sleeve part, the smooth sleeve part is located above the threaded part, the threaded part is used for threaded connection with the hollow insulator, and the stationary contact is sleeved on the smooth sleeve part.

[0015] The contact is provided with heat dissipation holes, and a plurality of heat dissipation holes are provided for heat dissipation of the stationary contact.

[0016] The bottom of the mounting seat is provided with a plurality of mounting holes, the mounting holes are arranged along the circumference of the center of the mounting seat, and the mounting holes are used for the installation and fixation of the hollow insulator.

[0017] The utility model has the following beneficial effects compared with the prior art:

[0018] 1. By arranging a limiting groove on the inner wall of the stationary contact and arranging a limiting device inside the insulator thread sleeve, when the stationary contact and the insulator thread sleeve are installed, with the further installation and rotation of the stationary contact, when the stationary contact rotates to a predetermined position, the ball is pushed out of the cavity under the elastic force of the spring and contacts with the limiting groove on the inner wall of the stationary contact, and the ball is engaged in the limiting groove. This frictional force effectively restricts the movement of the stationary contact in the axial and radial directions, thereby achieving the effect of limiting and fixing. By restricting the movement of the stationary contact, the limiting device ensures the stability and reliability of the electrical connection. Even under the action of external forces or vibrations, the stationary contact can remain in the predetermined position and will not fall off or shift. Description of the Drawings

[0019] Figure 1 is the overall three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 is the exploded schematic diagram of the overall three-dimensional structure of the utility model;

[0021] Figure 3 is the front structure schematic diagram of the utility model;

[0022] Figure 4 is the side structure schematic diagram of the utility model;

[0023] Figure 5It is a schematic structural view of the insulator threaded sleeve of the present utility model;

[0024] Figure 6 It is a schematic structural view of the limiting device of the present utility model;

[0025] In the figure: 1. Hollow insulator; 11. Umbrella skirt; 12. Mounting seat; 13. Mounting hole; 2. Static contact; 21. Contact; 22. Heat dissipation hole; 23. Contact sleeve; 3. Insulator threaded sleeve; 31. Threaded part; 32. Smooth sleeve part; 33. Ball; 34. Cavity; 35. Spring. Specific embodiments

[0026] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0027] The present utility model will be further described below with reference to the accompanying drawings.

[0028] As Figures 1 to 6 shown, a static contact structure applicable to a C-GS direct-acting three-position switch includes a hollow insulator 1, and the hollow insulator 1 is used to support and insulate the energized conductor;

[0029] Umbrella skirt 11, the umbrella skirt 11 is coated on the outer side of the hollow insulator 1 and is used to improve the insulation performance and protection effect; the umbrella skirt 11 is coated on the outer side of the hollow insulator 1, and by increasing the surface area and forming an air gap, the insulation performance is significantly improved, the occurrence of flashover and breakdown phenomena is prevented, the influence of external environmental factors such as rain and dust on the insulation performance is effectively prevented, and the service life of the equipment is extended.

[0030] Mounting seat 12, the mounting seat 12 is arranged at the bottom of the hollow insulator 1 and is used to fix and support the entire insulator assembly, and the mounting seat 12 and the hollow insulator 1 are integrally connected;

[0031] Insulator threaded sleeve 3, the hollow insulator 1 is arranged at the end far from the mounting seat 12, and a limiting device is arranged inside the insulator threaded sleeve 3, and the limiting device is used for the limiting and fixing function between the insulator threaded sleeve 3 and the static contact 221;

[0032] Static contact 2, the static contact 2 includes a contact 21 and a contact sleeve 23, the contact 21 is fixed on the outer peripheral wall of the contact sleeve 23, and the contact 21 is fixedly connected to the hollow insulator 1 through the contact sleeve 23.

[0033] The limiting device includes a cavity 34, which is arranged inside the insulator threaded sleeve 3. Inside the cavity 34, there are balls 33 and a spring 35. One end of the spring 35 is fixed inside the cavity 34, and the other end abuts against the ball 33. The front end of the ball 33 extends outside the cavity 34, and a limiting groove is provided on the inner wall of the contact sleeve 23.

[0034] The insulator threaded sleeve 3 includes a threaded portion 31 and a smooth sleeve portion 32. The smooth sleeve portion 32 is located above the threaded portion 31. The threaded portion 31 is used for threaded connection with the hollow insulator 1. The static contact 221 is sleeved on the smooth sleeve portion 32. The threaded connection design on the insulator threaded sleeve 3 improves the connection tightness and helps prevent the influence of external environmental factors on the internal electrical components.

[0035] The contact 21 is provided with heat dissipation holes 22. There are multiple heat dissipation holes 22, which are used for the heat dissipation of the static contact 221. The multiple heat dissipation holes 22 provided on the contact 21 help to dissipate the heat generated during the working process to the surrounding environment in time, preventing performance degradation or damage caused by excessive temperature.

[0036] The bottom of the mounting seat 12 is provided with multiple mounting holes 13. The mounting holes 13 are arranged along the circumference of the center of the mounting seat 12. The mounting holes 13 are used for the installation and fixation of the hollow insulator 1. The mounting seat 12 ensures the stable installation and support of the entire insulator assembly. The design of the multiple mounting holes 13 at the bottom facilitates the fixation of the device at the required position, such as inside a switchgear cabinet, through bolts or the like, improving the installation efficiency.

[0037] The working principle of the present utility model is as follows: When in use, the static contact 2 is sleeved on the insulator threaded sleeve 3 and is concentrically assembled therewith. The insulator threaded sleeve 3 is threadedly connected to the hollow insulator 1 through the threaded portion 31;

[0038] When the static contact 2 contacts the smooth sleeve portion 32 on the insulator threaded sleeve 3, the smooth sleeve portion 32 is inserted into the contact sleeve 23. When the limiting device on the smooth sleeve portion 32 moves to the limiting groove reserved in the contact sleeve 23, the ball 33 is pushed into the limiting groove on the inner wall of the contact sleeve 23 under the action of the spring 35, forming a snap-in limit to prevent the axial or radial movement of the static contact 2 and ensuring the stability and reliability of the connection with the moving contact.

[0039] The above-mentioned embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model belong to the scope of protection required by the present utility model.

Claims

1. A static contact structure of a C-GS direct-acting three-position switch, characterized in that: It includes a hollow insulator (1), and the hollow insulator (1) is used to support and insulate the live conductor; The umbrella skirt (11) is coated on the outer side of the hollow insulator (1) and is used to improve the insulation performance and protection effect; The mounting seat (12) is arranged at the bottom of the hollow insulator (1) and is used to fix and support the entire insulator assembly. The mounting seat (12) is integrally connected with the hollow insulator (1); The insulator threaded sleeve (3) is arranged at the end of the hollow insulator (1) far from the mounting seat (12). A limiting device is arranged inside the insulator threaded sleeve (3), and the limiting device is used for the limiting and fixing function between the insulator threaded sleeve (3) and the static contact (2); The static contact (2) includes a contact head (21) and a contact head sleeve (23). The contact head (21) is fixed on the outer peripheral wall of the contact head sleeve (23), and the contact head (21) is fixedly connected to the hollow insulator (1) through the contact head sleeve (23).

2. The static contact structure of a C-GS direct-acting three-position switch according to claim 1, characterized in that: The limiting device includes a cavity (34) arranged inside the insulator threaded sleeve (3). Inside the cavity (34), there are balls (33) and a spring (35). One end of the spring (35) is fixed inside the cavity (34), and the other end abuts against the ball (33). The front end of the ball (33) extends out of the cavity (34); A limiting groove is arranged on the inner wall of the contact head sleeve (23).

3. The static contact structure of a C-GS direct-acting three-position switch according to claim 2, characterized in that: The insulator threaded sleeve (3) includes a threaded portion (31) and a smooth sleeve portion (32). The smooth sleeve portion (32) is located above the threaded portion (31). The threaded portion (31) is used for threaded connection with the hollow insulator (1), and the static contact (2) is sleeved on the smooth sleeve portion (32).

4. The static contact structure of a C-GS direct-acting three-position switch according to claim 3, characterized in that: The contact head (21) is provided with heat dissipation holes (22), and there are multiple heat dissipation holes (22) for heat dissipation of the static contact (2).

5. The static contact structure of a C-GS direct-acting three-position switch according to claim 4, characterized in that: Multiple mounting holes (13) are arranged at the bottom of the mounting seat (12). The mounting holes (13) are arranged along the circumference of the center of the mounting seat (12), and the mounting holes (13) are used for the installation and fixation of the hollow insulator (1).

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